Laminated board



July '15,r 1930. w -F HAYES 1,110,520

. LANINATED BoARD I' Pa-.tentecl July I' *uNITED'srATEs wnLIA'M F. AYES, oFnETRoIr, MICHIGAN, nssIGNon To GAGNIER FIBRE PRODUCTS COMPANY, or DETROIT, MICHIGAN PATENT oFFl-CE MMI-Nunn BOARD' Appnationlmea June 21, 1926. semaine. '11a-iso.

yMy invention relates to a laminated board I of the type that includes a reinforced plasof paper o r its equivalent.'

' the present time for the above specified purstruct-ure without weakening the board and tic composition'arranged between two layers It is theprimary object of my-invention .to produce a material that is particularly adapt- 'ed for use as a substitute for the composite `composition, of.which the following is an fabrictstructuresthatjare used at the present time in the construction .of tops or roofs of automobiles. -It is also particularly adapted`for use infoundation panels in the up'- holstering of'an automobile andf for1em V bossed panels for finishing the interior of a motor vehicle. The improved material hereinafter described is, however, capable of numerous other uses though especially designed to provide an inexpensive, but 'superior substitute for the materials generally used at poses.

It is a further object o f myinvention to provide a laminated boardthat is as waterproof and moisture-proof as hard vulcanized rubber, and so tough that it can not be torn by hand. l At the same time my improved material is suiciently flexible and free from a tendency to setto permit sections that are ten feet in len-gtlito be rolled vinto rolls of two feet diameter, withoutl imparting to the material within the time 'required' for ship tion, when unrolled.

It is a, further object of my invention to provide an improved board that canbe nailed close to its'edges to any suitable foundation it is entirely feasible toremove any board that has been nailed in place and subsequently replace it. This is not possible in a straight fibre panel because the n ail holes so weaken it that it is notadvisable to replace it after it has been once removed, assuming that the panelv 'is removed without serious 1n]ury,.

When my material is used the'nails can safely be put inthe old holes when a panel is replaced.' 4 f I Other objects of the invention will appear as the description proceeds with reference toV the accompanying drawing, in which, f

Sulphur ysufficient to vulcanize the rubber compound.

I have found 'it advantageous and plro` yductive of .very satisfactoryresults to use an asphaltic composition-that contains about twenty per cent of stearin, though it should be understood that my invention is nOt restricted to 'the 'use of this composition.'

example: Per cent Asphalt or asphaltic composition .50 Rubber (pure) 5 Rubber (reclaimed) 40 Inorganic ller 3 `Rosin l Preferably, the reclaimed rubber is boot and shoe rubber though Iother -grades may be used. vThe filler employed maybe Whiting, barium sulphate or thelike. i

As will be understood by those skilled in the art, the hardness of the product may* be varied by increasing the filler and rosincontent and by correspondingly reducing the rubber content. A flexible product is needed in foundation panels in order that it may be i readily carried varound the corners of the body of the car, while a harder Aproduct is desiredfordoor panels. By varying the composition as above indicated the product having the desired characteristics may be readily produced.

The above ingredients, in thespecific proportions selected, are thoroughly mixed in a rolling mill, the asphalt and rubber being first given a twenty minute run'. Then the balance of the material is added, and the run continued'until the mixing is complete. The batch is allowed to season; for forty-eight hours and is then placed on a'calendering machine, and a wire screen or other equivalent reinforcing material' is embedded therein, as

shown at i-.on the drawing. The compound is then in a plastic condition. Layers 5 and 6 of paper .or any othersuitable material are then combined to the top and bottom of the compound and calendered tothe body 3.

The material is 'then' given a heat treatment of three hours duration at a temperature of 260 degrees Fahrenheit thus vulcanizing the rubber content and resulting in a product having the above stated characteristics,

characterized by the fact that it is sufficiently My improved material has been found to be especially efficacious for use in automobile to s. .At the present time tops are constructe of layers ofchicken Wire, cotton batting and top material applied separately. It has beenfound that by using my. improved board in lieu of the materials just referred to, that` a far superior top that it V`is practically impossible to puncture, results. And this is ought about with a reduction in-cost of material of fifty per cent, and with a reduction proportions are utilized as cementitious material.

4. Laminated board suitable for use in finishing the interior of a motor vehicle body, characterized bythe fact that it is sufficiently 'flexible to conform to curved surfaces of the body. of said vehicle, Water and moisture proof and capable of being nailed close to its edges without seriously weakening the board,l

consisting ofsurface protecting layers of paper, a Wire `reinforcement coextensive with said layers, and flexible cementitious material uniting said layers and reinforcement, said layers, reinforcement and material being combined by calendering, and said cementitious material being'chemically changed to cause said layers, reinforcementand mate- .rial'to' form a homogeneous structure.

WILLIAM F. HAYES.

in cost of labor of about seventy-five'pcr cent.

It has been found :further that when used in ltop construction my improved material as- 1. Laminatedboard suitable for usefor finishing theinterior of a'motor vehicle body flexible to conform to curved surfaces of the body of said vehicle, Water' and moisture Y proof and capable ofbeing nailed close to its edges without seriously weakening the-board, consisting of surface protecting layers of 'paper, a 'wire reinforcement coextensive with said layers, and flexible cementitious material uniting said layers andreinforcement, 5

said layers, reinforcement and material being combined by calendering. l

2. Laminated board suitable for use for` finishing the interior of a motor vehicle body' characterized by the fact that it is sufficiently flexible to conform to curved surfaces of the body of said vehicle, water and moisture proof and capable of being nailed close to its edges without seriously weakening the board, consisting of surface protecting layers of paper,

. avvire reinforcement coextensive avitli said layers, and flexible cementitiousmaterial consistlng of asphalt and rubber uniting said layers and reinforcement, said layers, reinforcement 'and material being combined by calendering, and said rubber being vulcanized.

3. The product defined in claim 2 in which asphalt and rubber in approximately equal 

